EP1123617B1 - Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz - Google Patents

Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz Download PDF

Info

Publication number
EP1123617B1
EP1123617B1 EP99959221A EP99959221A EP1123617B1 EP 1123617 B1 EP1123617 B1 EP 1123617B1 EP 99959221 A EP99959221 A EP 99959221A EP 99959221 A EP99959221 A EP 99959221A EP 1123617 B1 EP1123617 B1 EP 1123617B1
Authority
EP
European Patent Office
Prior art keywords
digital
voltage
transistor
circuit
ringing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99959221A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1123617A1 (de
Inventor
Jörg Hauptmann
Alexander Kahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infineon Technologies AG
Original Assignee
Infineon Technologies AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1998148606 external-priority patent/DE19848606C2/de
Priority claimed from DE1998158761 external-priority patent/DE19858761C1/de
Application filed by Infineon Technologies AG filed Critical Infineon Technologies AG
Publication of EP1123617A1 publication Critical patent/EP1123617A1/de
Application granted granted Critical
Publication of EP1123617B1 publication Critical patent/EP1123617B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Definitions

  • the present invention relates to a circuit arrangement according to the preamble of patent claim 1, as known from US 5,485,516.
  • a call signal is transmitted to the subscriber's terminal for the notification of a subscriber via an incoming call.
  • This call signal is represented by a sinusoidal AC voltage, the so-called ringing voltage or AC ringing voltage.
  • the called subscriber terminal must recognize the ringing signal and, if necessary, respond to the ringing signal (for example, notification of the called party via ringing tone or connection to the line).
  • Subscriber terminals form to match the telephone line Rufimpedanzen, which must meet different requirements due to the different structure of telephone networks in different countries. For Germany, the call impedance requirements can be found in the catalog of requirements of Bundespost BAPT 223 ZV5, version: 02.05.1994, page 12, chapter 2.6.1 Rufimpedanz.
  • ring impedances in subscriber terminals are constructed of a resistor and a capacitor, the resistor forming the resistive and the capacitor the capacitive portion of a ringing impedance.
  • the values of the resistor and capacitor must be adapted to the country-specific requirements, which prescribe specific values for the ring impedance. These requirements require a country-specific structure of the eTeil thriftendtechnik.
  • the disadvantage is the increased effort in the production of subscriber terminals, since a separate therapeuticend réelle must be made for each country, which meets the Rufimpedanzan beaut.
  • the invention is therefore based on the technical object to provide a circuit arrangement of the type mentioned, in which the call impedance circuitry is simple and yet flexible as possible to the given conditions adaptable.
  • an impedance adjustment device which adjusts the ringing impedance to the given conditions
  • the regulating means comprising a programmable digital filter and wherein the transfer function of the digital filter is programmed by programming the filter coefficients of the digital filter is adjustable.
  • the call impedance is programmable and thus adaptable to the respective desired circumstances, such as the most diverse country-specific requirements.
  • the control device has for this purpose, for example via a program-controlled unit, programmable digital filter.
  • the transfer function of the digital filter and thus the Rufimpedanz are adjustable by programming the filter coefficients of the digital filter.
  • the program-controlled unit is designed as a known microprocessor, such as a digital signal processor (DSP).
  • DSP digital signal processor
  • the digital filter is implemented in the form of a program in the digital signal processor.
  • the circuit arrangement is the Rufimpedanz by a capacitor which is connected between a first terminal for a two-wire line and a rectifier, and a transistor whose load path is connected between a first output of the rectifier and a reference potential formed.
  • the transistor is controlled by a control device, wherein the transfer function of the digital filter for adjusting the Rufimpedanz is adjustable to country-specific requirements.
  • the structure of a subscriber terminal is uniform and is determined only by setting the transfer function of the control device, in which country the subscriber terminal can be used.
  • the digital filter is preceded by a digital inverter circuit in a preferred embodiment.
  • the digital filter is followed by a digital rectifier circuit.
  • the control device has a transistor upstream analog integrator circuit in a preferred embodiment, which integrates the difference of a first and a second input voltage and whose output signal controls the transistor.
  • a voltage divider divides the voltage applied to the first output of the rectifier to a lower voltage.
  • the digital inverter circuit and the digital filter and the digital rectifier circuit are integrated on a digital module.
  • analog-to-digital converter, the digital-to-analog converter and the analog integrator circuit are integrated on an analog module.
  • control device has a first analog integrator circuit connected upstream of the control terminal of the first transistor, which integrates the difference between a first and a second input voltage and whose output signal controls the first transistor, and a second analog integrator circuit connected upstream of the control terminal of the second transistor, which integrates the difference between a third and a fourth input voltage and whose output signal controls the second transistor.
  • this circuit arrangement comes without rectifier circuit for rectification of the ringing AC voltage.
  • a first voltage divider preferably divides the first potential of the ringing AC voltage and a second voltage divider divides the second potential of the ringing AC voltage.
  • a first and a second analog-to-digital converter, a first and a second digital-to-analog converter and the first and second analog integrator circuit are integrated on an analog module.
  • the transistors are designed as n-channel MOSFET.
  • the circuit arrangement shown in Figure 1 for the electronic generation of a call impedance has two terminals a and b, which are connectable to a two-wire line of a telephone network. Call signals can be received by another subscriber via the two-wire line, wherein the call signals are generated by a sinusoidal alternating voltage V- of the frequency fR. In the following, this AC voltage is called ringing AC voltage.
  • the switch S which corresponds to the hook switch, is open so that DC components in the ringing signal are blocked by a capacitor C.
  • the capacitor C simultaneously forms a capacitive part of the Rufimpedanz.
  • a bridge rectifier 1 is connected, which rectifies the ringing AC voltage. From the rectified Rufcicschreib subsequent circuits are supplied with power. Furthermore, the setting of the line current I, which serves to adjust the Rufimpedanz ensured by the rectified Rufcicitati.
  • a rectified positive Va or negative Vb Rufcicitati is referenced to a reference potential VSS, wherein the amplitude of the rectified positive ringing AC voltage Va is much greater than the amplitude of the rectified negative ringing AC voltage Vb.
  • the first 12 and second 13 output of the bridge rectifier 1 are connected via a transistor T1 and a resistor R1 to the reference potential VSS.
  • the transistor T1 in combination with the capacitor C, forms the ringing impedance.
  • the ringing impedance is via a control of the resistance of the transistor T1 adaptable to the different country-specific requirements.
  • a control voltage Vst for the transistor T1 is derived by means of a digital control device from the rectified positive ringing alternating voltage Va and negative ringing alternating voltage Vb.
  • the rectified positive ringing AC voltage Va having high voltage values is divided by a voltage divider R2 and R3 to a lower voltage so as to be processed by the subsequent circuits in which signals have only low voltage levels relative to the rectified positive AC ringing voltage.
  • the voltage-divided positive ringing alternating voltage Va and the negative ringing alternating voltage Vb are supplied to a subtracting circuit 7 at the output of which a differential voltage Vab is applied.
  • the differential voltage Vab is then sampled by a first analog-to-digital converter 2 at a sampling rate fs and converted into a digital signal V'ab.
  • the digital signal V'ab is supplied to a first digital inverter circuit 3.
  • FIG. 2 shows a timing diagram with the digital input and output signal of the digital inverter circuit. If the digital values V'ab at the input of the first digital inverter circuit 3 fall below a lower presettable threshold value MIN, a counter starts to count at the sampling rate fs / N of the digital signal. If the counter reading exceeds a predefinable value that can be set by a digital control device 10 in accordance with the frequency of the ringing alternating voltage, the digital values at the output V'ab of the first digital inverter circuit 3 are inverted by sign reversal after a waiting time TS has elapsed.
  • MIN lower presettable threshold value
  • the counter remains reset and does not start counting again until the digital values V'ab at the input Threshold MIN below.
  • the digital input signal which represents a rectified sine wave - the ringing AC voltage with respect to the reference potential VSS - generates a digital output signal representing a first reference to the reference potential VSS ringing AC voltage.
  • the digital output signal of the digital inverter circuit 3 is supplied to a digital filter 4.
  • the digital filter 4 is programmable to adapt to country-specific requirements via a digital control device 10 in order to adjust the Rufimpedanz can, and has to do a programmable transfer function k.
  • the phase shift and amplification required by the digital filter 4 for the call impedance are calculated from the input signal V'ab.
  • the digital filter 4 may be implemented as a digital hardware filter in which the coefficients are programmable.
  • the digital filter can be implemented as a signal processing algorithm on a digital signal processor, whereby the filter function for different call impedances can be set by variables.
  • a digital rectifier circuit 5 rectifies the digital output signal of the digital filter 4 VSI by magnitude.
  • the output signal VSI of the digital rectifier circuit 5 is converted by a digital-to-analog converter 6 into an analog signal VI.
  • the analog signal VI is supplied to a first input of an analog integrator circuit 8. Via a second input, the analog integrator circuit 8 is supplied with the negative ringing AC voltage Vb, which is proportional to the line current. From both input signals, a difference is formed in the analog integrator circuit 8, which is subsequently is integrated. The output signal VSt of the analog integrator circuit 8 is fed to the control terminal of the transistor T1. The transistor T1 is set via the supplied voltage VSt.
  • FIG. 3 shows the adjustability of the line current I through the transistor T1.
  • the analog signal VI of the digital control device and the negative ringing AC voltage Vb which is proportional to the line current, are supplied to a subtractor 21, at whose output the differential voltage VI - Vb is applied.
  • the differential voltage VI-Vb is integrated by an integrator circuit 20.
  • the voltage Vst is applied, which is fed to the control terminal of the transistor T1.
  • the line current I is set.
  • the line current I is thus controlled via the analog signal VI of the digital control device so that the required Rufimpedanz Z at a differential voltage Vab from the gain ksense of the voltage divider R2 and R3, the transfer function k of the digital filter 4 and the conductance GM of the analog integrator circuit calculated:
  • the line current I is thus adjustable by the transistor T1.
  • the transistor T1 can in turn be adjusted by the programmable transfer function k of the digital filter 4.
  • the ringing impedance depends on the programmable transfer function k of the digital filter 4 and can be adapted to different country-specific requirements by simply reprogramming the transfer function k of the digital filter 4. For example, in a Memory 11 country-specific values for the Rufimpedanz be stored.
  • the digital controller 10 reads from the memory 11 the values required for programming a country-specific call impedance from the memory 11, programs the digital filter 4 accordingly and adjusts the digital inverter 3 to the frequency fR of the ringing AC voltage.
  • the circuit arrangement shown in Figure 4 for the electronic generation of a Rufimpedanz has a first terminal a and a second terminal b, which are connectable to a two-wire subscriber line. Call signals can be received via the two-wire line, wherein the call signals are generated by a sinusoidal alternating voltage V ⁇ with a frequency fR. DC components in the ringing signal are blocked by a first capacitor C1 and a second capacitor C2.
  • the first capacitor C1 and the second capacitor C2 further form a capacitive part of a ringing impedance.
  • a first series connection of the first capacitor C1 For the positive half wave of the ringing AC voltage V- a first series connection of the first capacitor C1, the load path of a first transistor T2 and a first resistor R10 is provided.
  • the series connection connects the first terminal a to a reference potential VSS.
  • a first potential Va- the ringing AC voltage V- can be tapped.
  • a second series connection of the second capacitor C2 For the negative half cycle of the ringing AC voltage V- a second series connection of the second capacitor C2, the load path of a second transistor T3 and a second resistor R20 is provided.
  • the series connection connects the second terminal b to the reference potential VSS.
  • a second potential Vb ⁇ of the ringing AC voltage V- is at the connection point of the second capacitor C2 and the second transistor T3 tapped.
  • the ringing impedance is formed in each case for the positive or negative half-wave of the ringing alternating voltage V- from the first capacitor C1 and the first transistor T2 or the second capacitor C2 and the second transistor T3.
  • a first line current I1 and a second line current I2 are respectively set in the first and second series circuit.
  • the second transistor T3 is switched to low impedance, so that the second series connection between the second terminal b and the reference potential VSS is low impedance.
  • the first transistor T2 is switched to low impedance, so that the first series connection between the first terminal a and the reference potential VSS is low impedance.
  • the first potential Va (positive half-wave) is divided by a first voltage divider R30 and R50 to a lower voltage, which is converted by a first analog-to-digital converter 2 'into a first digital signal V'a-.
  • the second potential Vb- (negative half-wave) is divided by a second voltage divider R40 and R60 to a lower voltage, which is converted by a second analog-to-digital converter 2 'into a second digital signal V'b-.
  • the first digital signal V'a ⁇ and the second digital signal V'b- are supplied to a digital filter 4 (impedance filter).
  • the digital filter 4 is programmed by a control unit 10 - for example a microprocessor - which is connected to a memory 11.
  • the programming of the digital Filter 4 is used to set country-specific parameters of the Rufimpedanz. For this purpose, various country-specific data can be stored in the memory 11.
  • the control unit 10 reads country-specific data from the memory 11 and programs the digital filter 4 accordingly.
  • the digital filter 4 generates a first digital output signal VSI1 and a second digital output signal VSI2.
  • the first digital output signal VSI1 is converted by a first digital-to-analog converter 6 'into a first input signal VI1 for a first analog integrator circuit 8'.
  • the second digital output signal VSI2 is converted by a second digital-to-analog converter 6 "into a second input signal VI2 for a second analog integrator circuit 8".
  • the first analog integrator circuit 8 integrates the difference of the first input signal VI1 and a second input signal Vam, which is tapped at the connection point of the load path of the first transistor T2 and the first resistor R10.
  • the second input signal Vam R10 * I1 depends on the first line current I1.
  • the second analog integrator circuit 8 "integrates the difference of the first input signal VI2 and a second input signal Vbm which is tapped at the connection point of the load path of the second transistor T3 and the second resistor R 20.
  • the second input signal Vbm R20 * I2 depends on this second line current I2.
  • FIG. 5 the structure of the first and second analog integrator circuits and the adjustability of the first line current I1 and the second line current I2 are shown in FIG first transistor T2 and the second transistor T3 shown.
  • the first analog control signal VI1 and the potential Vam which is tapped at the connection point of the load path of the first transistor T2 and the first resistor R10, are supplied to a first subtractor circuit 12, at whose output a differential voltage VI1 - Vam is present.
  • the differential voltage VI1-Vam is integrated by a first integrator circuit 11.
  • At the output of the first integrator circuit 11 is a voltage VSt1, which is fed to the control terminal of the first transistor T2.
  • the first line current I1 is set via the first transistor T2.
  • the first line current I1 is thus controlled via the first analog signal VI1 of the digital control device so that the required ringing impedance Z1 at a positive half cycle of the ringing AC voltage V- from the gain ksense1 of the first voltage divider R30 and R50, a first transfer function k1 of the digital filter 4 and the conductance GM1 of the first analog integrator circuit 8 'are calculated:
  • the first line current I1 is thus adjustable by the first transistor T2.
  • the first transistor T2 can in turn be adjusted by the programmable first transfer function k1 of the digital filter 4.
  • the ringing impedance depends on the programmable first transfer function k1 of the digital filter 4 and can be adapted to different country-specific requirements by simply reprogramming the first transfer function k1 of the digital filter 4.
  • country-specific values for the call impedance can be stored in the memory 11.
  • the control device 10 reads from the memory 11 the values required for programming a country-specific call impedance and programs the first transfer function k1 of the digital filter 4 accordingly.
  • the second analog control signal VI2 and the potential Vbm which is tapped at the connection point of the load path of the second transistor T3 and the second resistor R20, are supplied to a second subtractor circuit 22, at whose output a differential voltage VI2 - Vbm is applied.
  • the differential voltage VI2-Vbm is integrated by a second integrator circuit 21.
  • At the output of the second integrator circuit 21 is a voltage VSt2, which is fed to the control terminal of the second transistor T3.
  • the second line current I2 is set via the second transistor T3.
  • the second line current I2 is thus controlled via the second analog signal VI2 of the digital control device so that the required ringing impedance Z2 at a negative half cycle of the ringing AC voltage V- from the gain ksense2 of the second voltage divider R40 and R60, a second transfer function k2 of the digital filter 4 and the conductance GM2 of the second analog integrator circuit 8 ":
  • the second line current I2 is thus adjustable by the second transistor T3.
  • the second transistor T3 can in turn be adjusted by the programmable second transfer function k2 of the digital filter 4.
  • the call impedance depends from the programmable second transfer function k2 of the digital filter 4 and can be adapted to various country-specific requirements by simply reprogramming the second transfer function k2 of the digital filter 4.
  • the reprogramming of the second transfer function k2 takes place analogously to the reprogramming of the first transfer function k1.
  • the first transfer function k1 and the second transfer function k2 are preferably the same, so that the same call impedance Z is set in total for both a positive and a negative half wave of the ringing AC voltage V ⁇ .
  • an unbalanced ringing impedance is adjustable, which has a different ringing impedance Z1 for the positive half-wave of the ringing alternating voltage V- than for the negative half-wave of the ringing alternating voltage V-.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Networks Using Active Elements (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)
EP99959221A 1998-10-21 1999-10-21 Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz Expired - Lifetime EP1123617B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1998148606 DE19848606C2 (de) 1998-10-21 1998-10-21 Schaltungsanordnung zur elektronischen Erzeugung einer Rufimpedanz
DE19848606 1998-10-21
DE19858761 1998-12-18
DE1998158761 DE19858761C1 (de) 1998-12-18 1998-12-18 Schaltungsanordnung zur elektronischen Erzeugung einer Rufimpedanz
PCT/DE1999/003385 WO2000024181A1 (de) 1998-10-21 1999-10-21 Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz

Publications (2)

Publication Number Publication Date
EP1123617A1 EP1123617A1 (de) 2001-08-16
EP1123617B1 true EP1123617B1 (de) 2006-05-10

Family

ID=26049685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99959221A Expired - Lifetime EP1123617B1 (de) 1998-10-21 1999-10-21 Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz

Country Status (8)

Country Link
US (1) US7023985B1 (ko)
EP (1) EP1123617B1 (ko)
JP (1) JP3636988B2 (ko)
KR (1) KR100426440B1 (ko)
CN (1) CN1147116C (ko)
AT (1) ATE326113T1 (ko)
DE (1) DE59913417D1 (ko)
WO (1) WO2000024181A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7622673B2 (en) 2007-03-27 2009-11-24 Hewlett-Packard Development Company, L.P. Cable management system
CN102035920B (zh) * 2009-09-30 2013-08-07 国基电子（上海）有限公司 语音杂讯检测装置及方法
JP6323977B2 (ja) * 2012-12-27 2018-05-16 キヤノン株式会社 通信装置及び該装置の制御方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59005114D1 (de) * 1990-01-29 1994-04-28 Siemens Ag Verfahren und Anordnung zur Bildung des Leitungsabschlusses einer Telefonleitung.
DE4221567C2 (de) * 1992-07-01 1995-07-06 Siemens Ag Leitungsabschluß einer Telefonleitung
JPH0946273A (ja) 1995-07-31 1997-02-14 Nitsuko Corp ２線４線変換回路
US5796815A (en) * 1996-12-05 1998-08-18 Advanced Micro Devices, Inc. Communications device with improved ring signal detection
US6091806A (en) * 1997-10-16 2000-07-18 International Business Machines Corporation Data processing system having a programmable modem and method therefor
US6275581B1 (en) * 1998-03-10 2001-08-14 Agere Systems Guardian Corp. Extended feedback circuit employing capacitive coupling and sampled data filters

Also Published As

Publication number Publication date
JP3636988B2 (ja) 2005-04-06
KR100426440B1 (ko) 2004-04-14
JP2002528965A (ja) 2002-09-03
DE59913417D1 (de) 2006-06-14
KR20010099709A (ko) 2001-11-09
CN1331881A (zh) 2002-01-16
ATE326113T1 (de) 2006-06-15
EP1123617A1 (de) 2001-08-16
CN1147116C (zh) 2004-04-21
WO2000024181A1 (de) 2000-04-27
US7023985B1 (en) 2006-04-04

Similar Documents

Publication Publication Date Title
DE3426068A1 (de) Verfahren zum anpassen der lautstaerke eines lautsprechers an einen am lautsprecherort herrschenden stoergeraeuschpegel
DE2840250C2 (de) Schaltungsanordnung für eine leitungsgespeiste Lautfernsprechstation
DE3304759A1 (de) Verfahren und schaltungsanordnung zur transformatorlosen erzeugung kleiner gleichspannungen und deren verwendung
EP1123617B1 (de) Schaltungsanordnung zur elektronischen erzeugung einer rufimpedanz
DE69633906T2 (de) Teilnehmerleitungs-Schnittstellenschaltung, die durch eine C-MOS-Schaltung ausgeführt werden kann
EP1458216B1 (de) Vorrichtung und Verfahren zur Adaption von Hörgerätemikrofonen
DE69530387T2 (de) Detektorschaltung
CH668151A5 (de) Verfahren und einrichtung zum senden und zum empfangen von traegerfrequenten telephontaximpulsen.
DE3027783A1 (de) Schaltungsanordnung zum abschluss eines teilnehmerendgeraetes an teilnehmeranschlussleitung
DE3149133C2 (de) Schaltungsanordnung zum automatischen Ausgleich von elektrischen Kennwerten verschieden langer Fernsprechleitungen
DE19848606C2 (de) Schaltungsanordnung zur elektronischen Erzeugung einer Rufimpedanz
EP0788271B1 (de) Schaltungsanordnung zur Erzeugung von Gebührenimpulsen
DE10043160A1 (de) Tonsignalerkennungsschaltung zur Erkennung von Tonsignalen
DE19858761C1 (de) Schaltungsanordnung zur elektronischen Erzeugung einer Rufimpedanz
DE2938346C2 (de) Stromversorgungsschaltung
DE2906084C2 (de) Schaltungsanordnung zur Übertragung von sprachfrequenten Signalen in Fernsprechanlagen
DE2409888C2 (de) Schaltungsanordnung zum Umformen von sinusförmigen Eingangssignalen in rechteckförmige Ausgangssignale
DE19741794A1 (de) Vorrichtung zur Fehlerkorrektur eines PWM-Signals
DE3506277A1 (de) Oszillator mit variabler zustandsgroesse
EP0443117A2 (de) Analoge Leitungsanschaltung
EP0099566A2 (de) Regelbarer Entzerrer
DE2948077C2 (de) Aktive Gabelschaltung für Fernsprechleitungen
DE60126949T2 (de) Verfahren zum erzeugen eines rufsignals in einem teilnehmeranschluss-schnittstellenbaustein
DE4139610A1 (de) Verfahren zum einstellen von signaluebertragungsparamtern von teilnehmeranschlussschaltungen
DE2828414A1 (de) Rauschunterdrueckungsschaltung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010419

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RBV Designated contracting states (corrected)

Designated state(s): AT DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060510

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59913417

Country of ref document: DE

Date of ref document: 20060614

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060831

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061021

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101022

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101021

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 59913417

Country of ref document: DE

Owner name: LANTIQ DEUTSCHLAND GMBH, DE

Free format text: FORMER OWNER: INFINEON TECHNOLOGIES AG, 81669 MUENCHEN, DE

Effective date: 20110325

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110602 AND 20110608

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110609 AND 20110615

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20111103

Year of fee payment: 13

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20121021

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130628

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130501

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121021

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59913417

Country of ref document: DE

Effective date: 20130501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121031